KR101497332B1 - Electric heater for an automobile with heat storage material - Google Patents

Abstract

The present invention relates to an electric heater for a vehicle using a PTC device, and more particularly, to an electric heater for a vehicle using a PTC device. More particularly, the present invention relates to an electric heater for an automobile having a heat storage material To an electrothermal heater.

PTC device, vehicle electric heater, heat storage material, heat rod assembly, temperature

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric heater for an automotive vehicle,

The present invention relates to an electric heater for a vehicle using a PTC device, and more particularly, to an electric heater for a vehicle using a PTC device. More particularly, the present invention relates to an electric heater for an automobile having a heat storage material To an electrothermal heater.

Background Art [0002] Generally, an air conditioning system for a car includes a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. In the cooling system, the refrigerant is compressed by the compressor driven by the engine and sent to the condenser. In this condenser, the refrigerant is condensed by the forced blowing of the cooling fan, and then the refrigerant is passed through the receiver dryer, the expansion valve and the evaporator And return to the compressor. In this process, the air blown by the blowing fan of the blower unit installed at the inlet end of the air conditioning case is exchanged with the refrigerant passing through the evaporator, and the blowing air is discharged to the inside of the vehicle in a cool state to cool the inside of the vehicle.

Meanwhile, the heating system exchanges heat between the air blown by the blowing fan of the blower unit and the cooling water passing through the heater core in the process of returning the cooling water of the engine to the engine through the heater core, and discharging the blown air into the vehicle interior Heats the car interior.

Particularly, in the heating system, the interior of the vehicle is heated in a state in which the cooling water flowing around the engine is sufficiently heated after the engine is operated, and in the winter, the engine and the cooling water are cooled to a subzero temperature. It takes a long time to rise to a predetermined temperature or higher, so that the effect of the initial heating after the engine operation can not be expected.

Accordingly, an electric heater using a PTC (Positive Temperature Coefficient) element having a constant temperature characteristic in which a resistance value increases with an increase in temperature has been developed for the initial heating of an automobile.

The heat transfer heater using the PTC element is disposed in the vicinity of a normal heater core provided in a case of the air conditioner and directly heats the air, so that the temperature of the automobile interior can be quickly raised from the initial drive of the engine to the normal drive.

1 is an exploded perspective view of an electric heater according to a related art. 1, the electro-thermal heater includes a heat rod assembly 10, a cathode terminal 20, a heat radiating fin assembly 30, a support frame 40, a support frame 50, an upper cap 60, And a lower cap 70.

The heat load assembly 10 has a tubular tube 11. The tube 11 is inserted with a PTC element (not shown) and a positive terminal 14 for supplying power to the PTC element (not shown).

The heat transfer heater for automobiles according to the related art regulates the heat radiation capacity step by step in order to improve the battery capacity problem and the initial heating performance. That is, the heating performance is improved through the maximum driving during the initial heating, and when the cooling water temperature of the engine becomes high, the power supply to the electric heater is sequentially reduced to solve the battery capacity problem.

Fig. 2 shows an operation diagram of the electrothermal heater of Fig. Referring to FIG. 2, in the conventional electric heaters for automobiles, as the engine cooling water is increased, when the power source to be applied is stepwise reduced, there is a problem that the heating capability drops sharply in a stepwise manner due to the performance problem of the heat sink fins. In particular, when the supply of power to a certain number of PTC devices is interrupted at a predetermined time interval, there is a problem that the temperature lowering width becomes larger over time.

An object of the present invention is to provide an electric heater for an automobile equipped with a heat storage material so that the temperature can be gradually reduced without abruptly decreasing the temperature even when the power supplied to the PTC device is shut off in an automotive electric heater using the PTC device .

The present invention relates to a heat load assembly in which a PTC element and a positive terminal are embedded; An anode terminal installed at a predetermined distance from the heat rod assembly; A heat radiating fin assembly installed between the heat rod assembly and the negative electrode terminal; One side support frame and the other side support frame arranged to face each other on one side of the outermost heat radiating fin assemblies of the heat radiating fin assembly for supporting and fixing the heat radiating fin assembly and the heat rod assembly; An upper cap and a lower cap for supporting both ends of the heat-rod assembly, the cathode terminal, and the heat-radiating fin assembly, and both end portions of the one support frame and the other support frame; Wherein the heat storage assembly is filled with a first heat storage material for storing heat generated from the PTC device.

In the present invention, the heat rod assembly includes: a tube; A guide plate formed with a through hole and positioned at one side of the cathode terminal, the PTC element inserted into the through hole being inserted into the tube so that the PTC element comes in contact with the cathode terminal to supply power; The first heat storage material is installed between the other side of the cathode terminal and the inner side surface of the tube to perform the insulating film function in parallel.

In the present invention, the negative terminal may be surrounded by a second heat storage material for storing heat generated from the PTC device, and the heat generated from the PTC device may be stored in the one support frame and the other support frame. And a fourth heat storage material for storing heat generated from the PTC device may be provided on the upper and lower caps.

In the present invention, heat generated by a PTC device in which power supply is stopped is stored in a heat storage material even when power supplied to the PTC device is shut off by charging the heat storage material, the anode terminal assembly, the support frame assembly, There is an advantage that the temperature is gradually reduced gradually.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 3 is an exploded perspective view of one embodiment according to the present invention, Figure 4 is an exploded perspective view of the heat rod assembly of Figure 3, Figure 5 is a cross-sectional view of the heavy rod assembly of Figure 3, Figure 6 is a cross- Figure 7 shows the operation of Figure 3;

3, an embodiment according to the present invention includes a heat load assembly 110, a cathode terminal assembly 120, a heat radiating fin assembly 130, a support frame assembly 140, a support frame assembly 150, A cap 160, and a lower cap 170.

Referring to FIGS. 4 and 5, the heat rod assembly 110 has a tubular tube 111.

Referring to FIG. 4, a guide plate 112 is inserted into the tube 111. The guide plate 112 is formed with a plurality of through holes 112-H. At both side ends of the guide plate 112, projections 112-1 in the form of a rail can be formed to protrude.

Referring to FIGS. 4 and 5, a PTC (Positive Temperature Coefficient) element 113 is inserted into each of the through holes 112-H formed in the guide plate 112.

Referring to FIGS. 4 and 5, a positive terminal 114 is inserted between the protrusions 112-1 formed on both sides of the guide plate 112. As shown in FIG. One side of the positive electrode terminal 114 contacts the PTC element 113 fitted in the through hole 112-H of the guide plate 112 to supply power to the PTC element 113.

Referring to FIGS. 4 and 5, the tube 111 is filled with the first heat storage material 115. The first heat storage material 115 is for storing heat generated from the PTC element 113 and preventing sudden temperature drop of the vehicular heat storage heater when the PTC element 113 stops operating. The first storage material 115 may be either non-conductive or surrounded by a non-conductive material. In this case, the first storage material 115 is provided between the other side of the cathode terminal 114 and the inner surface of the tube 111, On the other hand, the first heat storage material 115 can be also charged between the PTC element 113 and the other inner surfaces of the tube 111. When the first storage material 115 is liquid, it is surrounded by a non-conductor and is insulated.

Referring to FIG. 3, the cathode terminal assembly 120 is installed at a predetermined distance from the heat rod assembly 110. 6, the negative terminal assembly 120 includes a negative terminal 121 and a second heat storage material 122 surrounding the negative terminal 121 to store heat generated from the PTC device 113. [ Like the first heat accumulating material 115, the second heat accumulating material 122 may be either non-conductive or non-conductive, and the second heat accumulating material 122 is insulated when surrounded by a non-conductive material.

Referring to FIG. 3, the heat sink fin assembly 130 has a heat sink fin support plate (not shown) for supporting a heat sink fin (not shown) and a heat sink fin (not shown).

Referring to FIG. 3, one side support frame assembly 140 and the other side support frame assembly 150 are disposed on the outer side surfaces of the outermost heat radiating fin assemblies 130 of the heat radiating fin assembly 130, respectively. One side support frame assembly 140 includes one side support frame 141 and a third side heat storage material 142 that is filled in one side support frame 141. Similarly, the other support frame assembly 150 includes a third support heat storage material (not shown) filled in the other support frame 151 and the other support frame 151. The third heat storage material 142 and the third heat storage material (not shown) are for storing heat generated from the PTC element 113, like the other heat storage materials 115 and 122.

3, the upper cap 160 and the lower cap 170 are connected to both ends of the heat rod assembly 110, the cathode terminal assembly 120, the heat radiating fin assembly 130, the one support frame assembly 140, And are fixed to both ends of the assembly 150 to fix them. Although not shown in the drawing, the upper and lower caps 160 and 170 are filled with a fourth upper accumulative material (not shown) and a fourth lower accumulative material (not shown). The fourth upper accumulation material (not shown) and the fourth lower accumulation material (not shown) are for storing heat generated from the PTC element 113.

Hereinafter, the operation of the above-described embodiment will be described.

FIG. 7 shows a temperature change when power supplied to a certain number of PTC devices 113 is sequentially cut off at regular time intervals.

Referring to FIG. 7, even when the power supplied to the PTC device 113 is cut off, heat generated from the PTC devices 113, whose power is cut off to the first to fourth storage materials, is stored for a predetermined time, The temperature does not descend stepwise but descends in a gentle curve. That is, abrupt temperature drop is prevented.

1 is an exploded perspective view of a conventional electric heat transfer heater for a vehicle.

2 is an operational view of the electrothermal heater of FIG.

3 is an exploded perspective view of an embodiment according to the present invention;

Figure 4 is an exploded perspective view of the heat rod assembly of Figure 3;

Figure 5 is a cross-sectional view of the heavy rod assembly of Figure 3;

6 is a cross-sectional view of the negative terminal of FIG. 3;

Figure 7 is an operational view of Figure 3;

Description of the Related Art

110: heat load assembly 111: tube

112: guide plate 112-H: through hole

112-1: projection 113: PTC element

114: positive electrode terminal 115: first storage material

120: negative electrode terminal assembly 121: negative electrode terminal

122: second storage material

130: heat sink fin assembly

140: one support frame assembly 141: one support frame

142: Third side heat storage material

150: the other support frame assembly 151: the other support frame

160: upper cap 170: lower cap

Claims (5)

A heat load assembly 110 in which a PTC element 113 and a cathode terminal 114 are embedded; An anode terminal 121 installed at a predetermined distance from the heat rod assembly 110; A heat radiating fin assembly 130 installed between the heat rod assembly 110 and the negative electrode terminal 121; One side support frame 141 and the other side support frame 141 are disposed on opposite sides of one side of the outermost side radiating fin assembly 130 of the radiating fin assembly 130 for supporting and fixing the radiating fin assembly 130 and the heat rod assembly 110, A support frame 151; An upper cap 160 for supporting and fixing both ends of the heat rod assembly 110, the cathode terminal 121 and the heat radiating fin assembly 130 and both ends of the one support frame 141 and the other support frame 151, (170), characterized in that: The heat load assembly 110 is filled with a first heat storage material 115 for storing heat generated from the PTC device 113, The heat load assembly 110 includes a tube 111; The PTC element 113 inserted into the through hole 112-H is positioned on one side of the cathode terminal 114 and is in contact with the cathode terminal 114, A guide plate 112 installed in the tube 111 so as to be supplied; And the first storage material 115 is disposed between the other side of the cathode terminal 114 and the inner surface of the tube 111 to perform an insulating film function in parallel with the first storage material 115 Wherein said heat accumulating member is a heat accumulating material. delete The method according to claim 1, Wherein the anode terminal (121) is surrounded by a second heat storage material (122) for storing heat generated from the PTC device (113). The method of claim 3, Wherein the one side support frame (141) and the other side support frame (151) are provided with a third heat storage material (142) for storing heat generated from the PTC device (113). 5. The method of claim 4, Wherein the upper cap (160) and the lower cap (170) are provided with a fourth heat storage material for storing heat generated from the PTC device (113).

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